-let test.MySei be an interface with some methods
-have some webservice with following header:

@WebService(endpointInterface="test.MySei")
public class MyWebService

this is just another way how to say that MyWebService implements test.MySei

that means that there should be also same behaviour:
- "MyWebService is not abstract and does not override abstract method ..." error
on ws class should appear
- "Implement all abstract methods" hint on ws class should be available
- all methods from test.MySei should be shown in "Override Methods..." dialog
- all methods from test.MySei should be implementable using code completion